Implement a linked list in Ruby
class Node
def initialize(data)
@data = data| require 'sinatra' | |
| # Be sure to set an environment variable containing your secret key. | |
| # This will be used to encrypt the cookies that are sent to the client. | |
| # | |
| # $ export SECRET_TOKEN=super_secret_key_goes_here | |
| use Rack::Session::Cookie, secret: ENV['SECRET_TOKEN'] | |
| get '/' do |